The Trouble with the Two-Headed Hydra

Mary-Kate and her mother visit the picturesque Greek Island of Galinios, where an ancient mosaic has been recently discovered. However, their peaceful trip takes a surprising turn when a plea for help reveals a mysterious incident involving a wrecked boat and a smashed jetty, tied to the local legend of the Two-Headed Hydra. With her curious spirit and determination, Mary-Kate sets out to uncover the truth behind the island's intriguing mystery.